我在轮询器内部有sfdc(salesforce连接器),然后在从sfdc获取数据并将数据加载到数据库后为其启用了水印。使用轮询中的轮询水印时遇到错误
<flow name="loadData" processingStrategy="synchronous">
<poll doc:name="Poll">
<fixed-frequency-scheduler frequency="2" timeUnit="MINUTES"/>
<watermark variable="timestamp" default-expression="#[server.dateTime.format("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'")]" selector="MAX" selector-expression="#[payload.LastModifiedDate]" object-store-ref="sfdcStore"/>
<processor-chain doc:name="Processor Chain">
<logger message="poller started at #[server.dateTime]" level="INFO" doc:name="start"/>
<sfdc:query config-ref="svccloud_salesforce_configuration" query="SELECT Name, , Id, BillingStreet, BillingCity, BillingState, BillingCountry, BillingPostalCode, Phone, Pathway_Status__c FROM Account where LastModifiedDate < #[flowVars['timestamp']] and RecordTypeId IN (SELECT Id FROM RecordType where Name = 'Customer')" doc:name="Quering Customer Details"/>
</processor-chain>
</poll>
<logger message="process to DB" level="INFO"/>
</flow>
数据正在获取并正确加载到数据库,但最新日期没有存储在timestamp变量中。我收到以下信息消息。如果存储时间戳值,我们将得到什么消息。能否请您在此
INFO 2017-08-28 15:06:26,795 [pool-13-thread-1] org.mule.transport.polling.watermark.Watermark: Watermark value will not be updated since poll processor returned no results